[BRX]

Mike, can you provide this?

This would be nice for quick switching back and forth to songs which aren't necessarily in a current setlist.

I'd consider this useful for looking something up quickly (in my case for instance in a score and then switching back to the part I'm playing).
The "next" obviously only works if you used the "previous" before, so there could be a message "last in recent tab" if there isn't a "next".

[otnt]

That's why I stick with 3-button navigation and double tap on "App Overview" button to switch to the score open in another app.

Or alt+tab in Windows OS.

[Zubersoft]

I can certainly consider adding something like that, although I'm assuming if you were at page 50/80 in a setlist, and you went to the next, then went back to the previous, you'd want it to resume at page 50, correct? That would mean in the pervious/next stack, I'd need to store what the previous song was as well as what page was open. 

Mike

[BRX]

Thanks and correct. MSP would have to be aware if the point of origin was in a setlist or a collection so that a normal "next" would bring up the next in the respective context.